Code generation and allocation method

Details Code generation and allocation method Code generation and allocation method

2005-02-22

2005-02-22

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from minimum d.c. level codes

C341S059000, C341S067000

Reexamination Certificate

active

06859152

ABSTRACT:
A method of generating and allocating codewords includes allocating one of two selectable codewords b1and b2as codeword “b” when a preceding codeword “a” and a following codeword “b” form a code stream X, in which the codewords b1and b2have opposite INV values which are parameters indicating whether the number of ‘1s’ contained in a codeword is an odd number or an even number. When the code stream of the preceding codeword “a” and the following codeword b1is X1, and when the code stream of the preceding codeword “a” and the following codeword b2is X2, the codewords are allocated such that the INV values of X1and X2are maintained to be opposite when the preceding codeword “a” or the following codeword b1(b2) (b1or b2) should be replaced by another codeword in compliance with a predetermined boundary condition given between codewords. The codewords are allocated so that a DC suppression capability of the code stream can be maintained.

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U.S. Appl. No. 10/125,564, Shim et al., filed Apr. 19, 2002.

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